Building Enterprise JavaScript Applications

Asserting results

Now, let's move on to our next step definition, which is an assertion step. In there, we should assert that the response from our server should have a 400 HTTP status code:

Then('our API should respond with a 400 HTTP status code', function () {  if (error.statusCode !== 400) {    throw new Error();  }});

Now, with our API server running in the background, run our E2E tests again. You should see the result of the second step changing from pending to failed:

$ yarn run test:e2e...F--Failures:1) Scenario: Empty Payload    When the client creates a POST request to /users    And attaches a generic empty payload   And sends the request ...